Surface Areas

If the diameter of cylinder is 28 cm and its height is 20 cm, the total surface area is

• 2992 cm²

• 3512 cm²

• 1959 cm²

• 2000 cm²

The solid figure with only one circular base is a

• cylinder

• cone

• square

• cuboid

The surface area of a cone of radius 9 cm and height 12 cm is

• (678 )6/7 cm²

• (572)5/6 cm²

• (432)1/2 cm²

• none of these

The base of the right circular cylinder is

• circle

• square

• cone

• rectangle

The surface area of a cylinder is

• πr²h

• 2πr(r+h)

• 2πr²

• 2πrh

The height of a cylinder is 20 cm and its base is a circle of radius 15 cm. The total surface area of the cylinder is

• 2200 cm²

• 4800 cm²

• 13300 cm²

• 3300 cm²

The area of the curved surface of a cone is

• πrl

• 2πrl

• πl

• none of these

The area of the curved surface of sphere is

• 4πr²

• 2πr²

• πr²

• 3πr

The surface area of a solid hemisphere is

• 4πr²

• 3πr²

• πr²

• 2πr²